feat(cli): build sass options

src/cli.ts

@@ -1,27 +1,30 @@
 #!/usr/bin/env node
 import chalk from 'chalk';
 import * as commandLineArgs from 'command-line-args';
+import * as debug from 'debug';
 import { OutputStyle } from './index';
+import { buildContext } from './interop/context';
 import './verbose';
 
+const d = debug('libsass:cli');
 const styleOptions = ['nested', 'expanded', 'compact', 'compressed'];
 /**
  * Definitions of available command line args.
  */
 const optionDefinitions = [
-  { name: 'stdin', alias: 's', description: 'Read input from standard input instead of an input file.' },
+  { name: 'stdin', alias: 's', description: 'Read input from standard input instead of an input file.', type: Boolean },
   {
     name: 'style',
     alias: 't',
     description: `Output style. Can be: ${styleOptions.join(', ')}.`
   },
-  { name: 'line-numbers', alias: 'l', description: 'Emit comments showing original line numbers.' },
+  { name: 'line-numbers', alias: 'l', description: 'Emit comments showing original line numbers.', type: Boolean },
   { name: 'load-path', alias: 'I', description: 'Set Sass import path.' },
   { name: 'plugin-path', alias: 'P', description: 'Set path to autoload plugins.' },
   { name: 'sourcemap', alias: 'm', description: 'Emit source map (auto or inline).' },
-  { name: 'omit-map-comment', alias: 'M', description: 'Omits the source map url comment.' },
-  { name: 'precision', alias: 'p', description: 'Set the precision for numbers.' },
-  { name: 'sass', alias: 'a', description: 'Treat input as indented syntax.' },
+  { name: 'omit-map-comment', alias: 'M', description: 'Omits the source map url comment.', type: Boolean },
+  { name: 'precision', alias: 'p', description: 'Set the precision for numbers.', type: Number },
+  { name: 'sass', alias: 'a', description: 'Treat input as indented syntax.', type: Boolean },
   { name: 'version', alias: 'v', description: 'Display compiled versions.', type: Boolean },
   { name: 'help', alias: 'h', description: 'Display this help message.', type: Boolean }
 ];
@@ -59,11 +62,54 @@ const buildDisplayVersion = async () => {
   ];
 };
 
+/**
+ * Construct value of sass option per command line options.
+ *
+ * @param sassOption
+ */
+const buildSassOption = (context: ReturnType<typeof buildContext>, options: commandLineArgs.CommandLineOptions) => {
+  const sassOption = context.options.create();
+  //Set default values
+  sassOption.outputStyle = OutputStyle.SASS_STYLE_NESTED;
+  sassOption.precision = 5;
+
+  Object.keys(options)
+    .map(key => ({ key, value: options[key] }))
+    .forEach(({ key, value }) => {
+      switch (key) {
+        case 'stdin':
+          break;
+        case 'style':
+          break;
+        case 'lineNumbers':
+          sassOption.sourceComments = true;
+          break;
+        case 'loadPath':
+          break;
+        case 'pluginPath':
+          break;
+        case 'sourcemap':
+          break;
+        case 'omitMapComment':
+          break;
+        case 'precision':
+          sassOption.precision = parseInt(value, 10);
+          break;
+        case 'sass':
+          sassOption.isIndentedSyntaxSrc = true;
+          break;
+      }
+    });
+
+  return sassOption;
+};
+
 (async () => {
   const options = commandLineArgs(optionDefinitions, { camelCase: true });
   const displayHelp = options.help || Object.keys(options).length === 0;
   const displayVersion = options.version;
 
+  d(`Received options`, { options });
   if (displayHelp || displayVersion) {
     const cmdUsage = await import('command-line-usage');
     const usageDefinition = displayHelp ? helpDefinitions : await buildDisplayVersion();
@@ -74,9 +120,7 @@ const buildDisplayVersion = async () => {
 
   const { loadModule } = await import('./loadModule');
   const { context } = await loadModule();
-  const sassOption = context.options.create();
-  sassOption.outputStyle = OutputStyle.SASS_STYLE_NESTED;
-  sassOption.precision = 5;
+  const sassOption = buildSassOption(context, options);
 
   sassOption.dispose();
 })();